Cooler



FIG. 1 is a top front slightly left side perspective view of a cooler showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side view thereof (the right side is a mirror image of FIG. 3);

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken lines represent the bounds of the claimed design but form no part thereof. 

We claim the ornamental design for a cooler, as shown and described. 